Study on an oxygen sensing rhenium(I) complex with enlarged sensing/active area: fabrication, photophysical parameters and molecular oxygen sensing performance

Spectrochim Acta A Mol Biomol Spectrosc. 2014 Apr 5:123:369-75. doi: 10.1016/j.saa.2013.12.055. Epub 2013 Dec 17.

Abstract

In this paper, we synthesize a novel 1,10-phenanthroline-derived (Phen-derived) diamine ligand of benzo[f][1,10]phenanthroline-6,7-dicarbonitrile (Phen-CN) with enlarged conjugation planar and its corresponding Re(I) complex of Re(CO)3Cl(Phen-CN), hoping to achieve an optical sensor owing large sensing/active area. Its geometric and electronic structures are investigated, which suggests that the effective sensing/active area of Re(CO)3Cl(Phen-CN) is enlarged by the successful formation of conjugation planar. The promising photophysical parameters of Re(CO)3Cl(Phen-CN), including large sensing/active area and long excited state lifetime, make it a potential probe for oxygen detection. By doping Re(CO)3Cl(Phen-CN) into a polymer matrix of poly(vinylpyrrolidone), oxygen sensing performances of the resulted composite materials are investigated. Finally, a high sensitivity of 17.1 is realized, with short response/recovery time of 9s/32s.

Keywords: Conjugation planar; Oxygen sensing; Photoluminescence; Re(I) complex.

MeSH terms

  • Coordination Complexes / chemistry*
  • Diamines / chemistry
  • Luminescent Measurements
  • Models, Molecular
  • Nanofibers / chemistry*
  • Nanofibers / ultrastructure
  • Oxygen / analysis*
  • Phenanthrolines / chemistry
  • Rhenium / chemistry*

Substances

  • Coordination Complexes
  • Diamines
  • Phenanthrolines
  • Rhenium
  • Oxygen
  • 1,10-phenanthroline